Hi Dick,
Congrats for the first QSO - hope to work you soon.
For some reason I was not able to get the right settings in spec lab.
Resolution is difficult, the tone went down in noise, it looked like.
Anyway, my ear was better then the computer.....
Maybe some tips about advised settings?
If you get lost in the settings, enter the "Quick Settings" menu, and
select "Slow Morse Reception" ... "3 Seconds/dot" (=QRSS3).
If you hear a signal but don't see a strong line in the spectrogram, try
this:
- scroll the the frequency axis around (towards higher or lower audio
frequencies until you find the spot), by holding the left mouse button
down on the frequency scale, and move the mouse while keeping the button
pressed. SL will redraw the spectrum completely, so old parts of the
frequency axis will become visible then.
- try the "contrast" and "brightness" controls on the left side. They
are extremely important to squeeze the last fraction of a decibel out of
the screen.
- To see the full bandwidth on the screen, click on the frequency axis
with the right(!) mouse button and select "Zoom Out". The spectrogram
will be redrawn immediately (also the old parts). Then, to examine
something in detail, click on the frequency axis again (near the
interesting frequency) and select "Zoom In" or "Zoom to 1 pixel per FFT
bin". The latter case gives the optimum aspect ratio for QRSS, DFCW, and
DF6NM's Chirped Hell.
- Life is easier if you enter the "VFO frequency" of your receiver to
see the "high frequency" (instead of the audio frequency) on the
frequency scale. For example, I always tune my LF RX to 135.8 kHz in
USB, and enter "135.8k" in the "Offs"-field on the right side. Then I
scroll the spectrogram's frequency scale so 137.7 kHz is in the middle
of the screen.
- For very weak signals, I find the "sunrise" color palette better
suited than the multi-coloured default palette. The colour palette can
be selected through the file menu.
Best regards / CUL,
Wolf DL4YHF .
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